Event Sourcing PHP 03

event-sourcing-php-03.php

class Product
{
    private int $productId;
    private float $price;

    public function changePrice(float $price): array
    {
        return [new PriceWasChanged($this->productId, $price)];
    }
    
    public function onPriceWasChanged(PriceWasChanged $event): void
    {
        $this->price = $event->getPrice();
    }
}